Document Detail


Impaired phosphatidylcholine biosynthesis and ascorbic acid depletion in lung during lipopolysaccharide-induced endotoxaemia in guinea pigs.
MedLine Citation:
PMID:  9350041     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Injection of guinea pigs with a single dose of Escherichia coli lipopolysaccharide (3.2 mg/100 g) induces a reversible endotoxic shock that was evaluated by measuring plasma glucose levels and aspartate aminotransferase activity at 24 h after lipopolysaccharide injection. The hypoglycaemia and the increase in plasma aminotransferase activity observed, correlated with the alterations found during the recovery phase of endotoxic shock. When lipid peroxidation and some antioxidant systems were measured in lungs from treated animals, we only found differences in ascorbic acid content, that was decreased by 50%. Lipopolysaccharide treatment results in a depression of pulmonary phosphatidylcholine synthesis, that correlates with the surfactant deficiencies associated with respiratory illnesses in septic shock. Guinea pigs fed on a diet with a low content in ascorbic acid were more sensitive to endotoxin. In these animals we found no detectable levels of ascorbic acid in lung, whereas both vitamin E lung levels and pulmonary phosphatidylcholine synthesis were significantly decreased. Our results point out the significance of ascorbic acid in the protection against oxidative lung injury associated to endotoxaemia, and validate our shock model for further studies on the mechanisms of this pathological condition.
Authors:
E Benito; M A Bosch
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Molecular and cellular biochemistry     Volume:  175     ISSN:  0300-8177     ISO Abbreviation:  Mol. Cell. Biochem.     Publication Date:  1997 Oct 
Date Detail:
Created Date:  1997-12-04     Completed Date:  1997-12-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0364456     Medline TA:  Mol Cell Biochem     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  117-23     Citation Subset:  IM    
Affiliation:
Department of Biochemistry and Molecular Biology, Faculty of Chemistry, Universidad Complutense, Madrid, Spain.
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MeSH Terms
Descriptor/Qualifier:
Animals
Antioxidants / metabolism*,  pharmacology
Ascorbic Acid / metabolism*,  pharmacology
Endotoxemia / metabolism,  physiopathology*
Escherichia coli
Guinea Pigs
Lipid Peroxidation / drug effects
Lipopolysaccharides
Lung / metabolism*
Male
Phosphatidylcholines / biosynthesis*
Shock, Septic / metabolism,  physiopathology
Superoxide Dismutase / metabolism
Vitamin E / metabolism
Chemical
Reg. No./Substance:
0/Antioxidants; 0/Lipopolysaccharides; 0/Phosphatidylcholines; 1406-18-4/Vitamin E; 50-81-7/Ascorbic Acid; EC 1.15.1.1/Superoxide Dismutase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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